drivers/pcmcia/au1000_pb1x00.c

   1 /*
   2  *
   3  * Alchemy Semi Pb1x00 boards specific pcmcia routines.
   4  *
   5  * Copyright 2002 MontaVista Software Inc.
   6  * Author: MontaVista Software, Inc.
   7  *              ppopov@mvista.com or source@mvista.com
   8  *
   9  * ########################################################################
  10  *
  11  *  This program is free software; you can distribute it and/or modify it
  12  *  under the terms of the GNU General Public License (Version 2) as
  13  *  published by the Free Software Foundation.
  14  *
  15  *  This program is distributed in the hope it will be useful, but WITHOUT
  16  *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  17  *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  18  *  for more details.
  19  *
  20  *  You should have received a copy of the GNU General Public License along
  21  *  with this program; if not, write to the Free Software Foundation, Inc.,
  22  *  59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
  23  */
  24 #include <linux/module.h>
  25 #include <linux/init.h>
  26 #include <linux/delay.h>
  27 #include <linux/ioport.h>
  28 #include <linux/kernel.h>
  29 #include <linux/tqueue.h>
  30 #include <linux/timer.h>
  31 #include <linux/mm.h>
  32 #include <linux/proc_fs.h>
  33 #include <linux/version.h>
  34 #include <linux/types.h>
  35
  36 #include <pcmcia/version.h>
  37 #include <pcmcia/cs_types.h>
  38 #include <pcmcia/cs.h>
  39 #include <pcmcia/ss.h>
  40 #include <pcmcia/bulkmem.h>
  41 #include <pcmcia/cistpl.h>
  42 #include <pcmcia/bus_ops.h>
  43 #include "cs_internal.h"
  44
  45 #include <asm/io.h>
  46 #include <asm/irq.h>
  47 #include <asm/system.h>
  48
  49 #include <asm/au1000.h>
  50 #include <asm/au1000_pcmcia.h>
  51
  52 #define debug(fmt, arg...) do { } while (0)
  53
  54 #ifdef CONFIG_MIPS_PB1000
  55 #include <asm/pb1000.h>
  56 #define PCMCIA_IRQ AU1000_GPIO_15
  57 #elif defined (CONFIG_MIPS_PB1500)
  58 #include <asm/pb1500.h>
  59 #define PCMCIA_IRQ AU1500_GPIO_203
  60 #elif defined (CONFIG_MIPS_PB1100)
  61 #include <asm/pb1100.h>
  62 #define PCMCIA_IRQ AU1000_GPIO_11
  63 #endif
  64
  65 static int pb1x00_pcmcia_init(struct pcmcia_init *init)
  66 {
  67 #ifdef CONFIG_MIPS_PB1000
  68         u16 pcr;
  69         pcr = PCR_SLOT_0_RST | PCR_SLOT_1_RST;
  70
  71         au_writel(0x8000, PB1000_MDR); /* clear pcmcia interrupt */
  72         au_sync_delay(100);
  73         au_writel(0x4000, PB1000_MDR); /* enable pcmcia interrupt */
  74         au_sync();
  75
  76         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,0);
  77         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,1);
  78         au_writel(pcr, PB1000_PCR);
  79         au_sync_delay(20);
  80
  81         return PCMCIA_NUM_SOCKS;
  82
  83 #else /* fixme -- take care of the Pb1500 at some point */
  84
  85         u16 pcr;
  86         pcr = au_readw(PCMCIA_BOARD_REG) & ~0xf; /* turn off power */
  87         pcr &= ~(PC_DEASSERT_RST | PC_DRV_EN);
  88         au_writew(pcr, PCMCIA_BOARD_REG);
  89         au_sync_delay(500);
  90         return PCMCIA_NUM_SOCKS;
  91 #endif
  92 }
  93
  94 static int pb1x00_pcmcia_shutdown(void)
  95 {
  96 #ifdef CONFIG_MIPS_PB1000
  97         u16 pcr;
  98         pcr = PCR_SLOT_0_RST | PCR_SLOT_1_RST;
  99         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,0);
 100         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,1);
 101         au_writel(pcr, PB1000_PCR);
 102         au_sync_delay(20);
 103         return 0;
 104 #else
 105         u16 pcr;
 106         pcr = au_readw(PCMCIA_BOARD_REG) & ~0xf; /* turn off power */
 107         pcr &= ~(PC_DEASSERT_RST | PC_DRV_EN);
 108         au_writew(pcr, PCMCIA_BOARD_REG);
 109         au_sync_delay(2);
 110         return 0;
 111 #endif
 112 }
 113
 114 static int
 115 pb1x00_pcmcia_socket_state(unsigned sock, struct pcmcia_state *state)
 116 {
 117         u32 inserted0, inserted1;
 118         u16 vs0, vs1;
 119
 120 #ifdef CONFIG_MIPS_PB1000
 121         vs0 = vs1 = (u16)au_readl(PB1000_ACR1);
 122         inserted0 = !(vs0 & (ACR1_SLOT_0_CD1 | ACR1_SLOT_0_CD2));
 123         inserted1 = !(vs1 & (ACR1_SLOT_1_CD1 | ACR1_SLOT_1_CD2));
 124         vs0 = (vs0 >> 4) & 0x3;
 125         vs1 = (vs1 >> 12) & 0x3;
 126 #else
 127         vs0 = (au_readw(BOARD_STATUS_REG) >> 4) & 0x3;
 128 #ifdef CONFIG_MIPS_PB1500
 129         inserted0 = !((au_readl(GPIO2_PINSTATE) >> 1) & 0x1); /* gpio 201 */
 130 #else /* Pb1100 */
 131         inserted0 = !((au_readl(SYS_PINSTATERD) >> 9) & 0x1); /* gpio 9 */
 132 #endif
 133         inserted1 = 0;
 134 #endif
 135
 136         state->ready = 0;
 137         state->vs_Xv = 0;
 138         state->vs_3v = 0;
 139         state->detect = 0;
 140
 141         if (sock == 0) {
 142                 if (inserted0) {
 143                         switch (vs0) {
 144                                 case 0:
 145                                 case 2:
 146                                         state->vs_3v=1;
 147                                         break;
 148                                 case 3: /* 5V */
 149                                         break;
 150                                 default:
 151                                         /* return without setting 'detect' */
 152                                         printk(KERN_ERR "pb1x00 bad VS (%d)\n",
 153                                                         vs0);
 154                                         return 0;
 155                         }
 156                         state->detect = 1;
 157                 }
 158         }
 159         else  {
 160                 if (inserted1) {
 161                         switch (vs1) {
 162                                 case 0:
 163                                 case 2:
 164                                         state->vs_3v=1;
 165                                         break;
 166                                 case 3: /* 5V */
 167                                         break;
 168                                 default:
 169                                         /* return without setting 'detect' */
 170                                         printk(KERN_ERR "pb1x00 bad VS (%d)\n",
 171                                                         vs1);
 172                                         return 0;
 173                         }
 174                         state->detect = 1;
 175                 }
 176         }
 177
 178         if (state->detect) {
 179                 state->ready = 1;
 180         }
 181
 182         state->bvd1=1;
 183         state->bvd2=1;
 184         state->wrprot=0;
 185         return 1;
 186 }
 187
 188
 189 static int pb1x00_pcmcia_get_irq_info(struct pcmcia_irq_info *info)
 190 {
 191
 192         if(info->sock > PCMCIA_MAX_SOCK) return -1;
 193
 194         /*
 195          * Even in the case of the Pb1000, both sockets are connected
 196          * to the same irq line.
 197          */
 198         info->irq = PCMCIA_IRQ;
 199
 200         return 0;
 201 }
 202
 203
 204 static int
 205 pb1x00_pcmcia_configure_socket(const struct pcmcia_configure *configure)
 206 {
 207         u16 pcr;
 208
 209         if(configure->sock > PCMCIA_MAX_SOCK) return -1;
 210
 211 #ifdef CONFIG_MIPS_PB1000
 212         pcr = au_readl(PB1000_PCR);
 213
 214         if (configure->sock == 0) {
 215                 pcr &= ~(PCR_SLOT_0_VCC0 | PCR_SLOT_0_VCC1 |
 216                                 PCR_SLOT_0_VPP0 | PCR_SLOT_0_VPP1);
 217         }
 218         else  {
 219                 pcr &= ~(PCR_SLOT_1_VCC0 | PCR_SLOT_1_VCC1 |
 220                                 PCR_SLOT_1_VPP0 | PCR_SLOT_1_VPP1);
 221         }
 222
 223         pcr &= ~PCR_SLOT_0_RST;
 224         debug("Vcc %dV Vpp %dV, pcr %x\n",
 225                         configure->vcc, configure->vpp, pcr);
 226         switch(configure->vcc){
 227                 case 0:  /* Vcc 0 */
 228                         switch(configure->vpp) {
 229                                 case 0:
 230                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_GND,
 231                                                         configure->sock);
 232                                         break;
 233                                 case 12:
 234                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_12V,
 235                                                         configure->sock);
 236                                         break;
 237                                 case 50:
 238                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_5V,
 239                                                         configure->sock);
 240                                         break;
 241                                 case 33:
 242                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_3V,
 243                                                         configure->sock);
 244                                         break;
 245                                 default:
 246                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,
 247                                                         configure->sock);
 248                                         printk("%s: bad Vcc/Vpp (%d:%d)\n",
 249                                                         __FUNCTION__,
 250                                                         configure->vcc,
 251                                                         configure->vpp);
 252                                         break;
 253                         }
 254                         break;
 255                 case 50: /* Vcc 5V */
 256                         switch(configure->vpp) {
 257                                 case 0:
 258                                         pcr |= SET_VCC_VPP(VCC_5V,VPP_GND,
 259                                                         configure->sock);
 260                                         break;
 261                                 case 50:
 262                                         pcr |= SET_VCC_VPP(VCC_5V,VPP_5V,
 263                                                         configure->sock);
 264                                         break;
 265                                 case 12:
 266                                         pcr |= SET_VCC_VPP(VCC_5V,VPP_12V,
 267                                                         configure->sock);
 268                                         break;
 269                                 case 33:
 270                                         pcr |= SET_VCC_VPP(VCC_5V,VPP_3V,
 271                                                         configure->sock);
 272                                         break;
 273                                 default:
 274                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,
 275                                                         configure->sock);
 276                                         printk("%s: bad Vcc/Vpp (%d:%d)\n",
 277                                                         __FUNCTION__,
 278                                                         configure->vcc,
 279                                                         configure->vpp);
 280                                         break;
 281                         }
 282                         break;
 283                 case 33: /* Vcc 3.3V */
 284                         switch(configure->vpp) {
 285                                 case 0:
 286                                         pcr |= SET_VCC_VPP(VCC_3V,VPP_GND,
 287                                                         configure->sock);
 288                                         break;
 289                                 case 50:
 290                                         pcr |= SET_VCC_VPP(VCC_3V,VPP_5V,
 291                                                         configure->sock);
 292                                         break;
 293                                 case 12:
 294                                         pcr |= SET_VCC_VPP(VCC_3V,VPP_12V,
 295                                                         configure->sock);
 296                                         break;
 297                                 case 33:
 298                                         pcr |= SET_VCC_VPP(VCC_3V,VPP_3V,
 299                                                         configure->sock);
 300                                         break;
 301                                 default:
 302                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,
 303                                                         configure->sock);
 304                                         printk("%s: bad Vcc/Vpp (%d:%d)\n",
 305                                                         __FUNCTION__,
 306                                                         configure->vcc,
 307                                                         configure->vpp);
 308                                         break;
 309                         }
 310                         break;
 311                 default: /* what's this ? */
 312                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,configure->sock);
 313                         printk(KERN_ERR "%s: bad Vcc %d\n",
 314                                         __FUNCTION__, configure->vcc);
 315                         break;
 316         }
 317
 318         if (configure->sock == 0) {
 319         pcr &= ~(PCR_SLOT_0_RST);
 320                 if (configure->reset)
 321                 pcr |= PCR_SLOT_0_RST;
 322         }
 323         else {
 324                 pcr &= ~(PCR_SLOT_1_RST);
 325                 if (configure->reset)
 326                         pcr |= PCR_SLOT_1_RST;
 327         }
 328         au_writel(pcr, PB1000_PCR);
 329         au_sync_delay(300);
 330
 331 #else
 332
 333         pcr = au_readw(PCMCIA_BOARD_REG) & ~0xf;
 334
 335         debug("Vcc %dV Vpp %dV, pcr %x, reset %d\n",
 336                         configure->vcc, configure->vpp, pcr, configure->reset);
 337
 338
 339         switch(configure->vcc){
 340                 case 0:  /* Vcc 0 */
 341                         pcr |= SET_VCC_VPP(0,0);
 342                         break;
 343                 case 50: /* Vcc 5V */
 344                         switch(configure->vpp) {
 345                                 case 0:
 346                                         pcr |= SET_VCC_VPP(2,0);
 347                                         break;
 348                                 case 50:
 349                                         pcr |= SET_VCC_VPP(2,1);
 350                                         break;
 351                                 case 12:
 352                                         pcr |= SET_VCC_VPP(2,2);
 353                                         break;
 354                                 case 33:
 355                                 default:
 356                                         pcr |= SET_VCC_VPP(0,0);
 357                                         printk("%s: bad Vcc/Vpp (%d:%d)\n",
 358                                                         __FUNCTION__,
 359                                                         configure->vcc,
 360                                                         configure->vpp);
 361                                         break;
 362                         }
 363                         break;
 364                 case 33: /* Vcc 3.3V */
 365                         switch(configure->vpp) {
 366                                 case 0:
 367                                         pcr |= SET_VCC_VPP(1,0);
 368                                         break;
 369                                 case 12:
 370                                         pcr |= SET_VCC_VPP(1,2);
 371                                         break;
 372                                 case 33:
 373                                         pcr |= SET_VCC_VPP(1,1);
 374                                         break;
 375                                 case 50:
 376                                 default:
 377                                         pcr |= SET_VCC_VPP(0,0);
 378                                         printk("%s: bad Vcc/Vpp (%d:%d)\n",
 379                                                         __FUNCTION__,
 380                                                         configure->vcc,
 381                                                         configure->vpp);
 382                                         break;
 383                         }
 384                         break;
 385                 default: /* what's this ? */
 386                         pcr |= SET_VCC_VPP(0,0);
 387                         printk(KERN_ERR "%s: bad Vcc %d\n",
 388                                         __FUNCTION__, configure->vcc);
 389                         break;
 390         }
 391
 392         au_writew(pcr, PCMCIA_BOARD_REG);
 393         au_sync_delay(300);
 394
 395         if (!configure->reset) {
 396                 pcr |= PC_DRV_EN;
 397                 au_writew(pcr, PCMCIA_BOARD_REG);
 398                 au_sync_delay(100);
 399                 pcr |= PC_DEASSERT_RST;
 400                 au_writew(pcr, PCMCIA_BOARD_REG);
 401                 au_sync_delay(100);
 402         }
 403         else {
 404                 pcr &= ~(PC_DEASSERT_RST | PC_DRV_EN);
 405                 au_writew(pcr, PCMCIA_BOARD_REG);
 406                 au_sync_delay(100);
 407         }
 408 #endif
 409         return 0;
 410 }
 411
 412
 413 struct pcmcia_low_level pb1x00_pcmcia_ops = {
 414         pb1x00_pcmcia_init,
 415         pb1x00_pcmcia_shutdown,
 416         pb1x00_pcmcia_socket_state,
 417         pb1x00_pcmcia_get_irq_info,
 418         pb1x00_pcmcia_configure_socket
 419 };